ssl/ssl_ciph.c

   1 /* ssl/ssl_ciph.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  * ECC cipher suite support in OpenSSL originally developed by
 114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 115  */
 116 /* ====================================================================
 117  * Copyright 2005 Nokia. All rights reserved.
 118  *
 119  * The portions of the attached software ("Contribution") is developed by
 120  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 121  * license.
 122  *
 123  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 124  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 125  * support (see RFC 4279) to OpenSSL.
 126  *
 127  * No patent licenses or other rights except those expressly stated in
 128  * the OpenSSL open source license shall be deemed granted or received
 129  * expressly, by implication, estoppel, or otherwise.
 130  *
 131  * No assurances are provided by Nokia that the Contribution does not
 132  * infringe the patent or other intellectual property rights of any third
 133  * party or that the license provides you with all the necessary rights
 134  * to make use of the Contribution.
 135  *
 136  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 137  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 138  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 139  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 140  * OTHERWISE.
 141  */
 142
 143 #include <stdio.h>
 144 #include <openssl/objects.h>
 145 #include <openssl/comp.h>
 146 #include "ssl_locl.h"
 147
 148 #define SSL_ENC_DES_IDX         0
 149 #define SSL_ENC_3DES_IDX        1
 150 #define SSL_ENC_RC4_IDX         2
 151 #define SSL_ENC_RC2_IDX         3
 152 #define SSL_ENC_IDEA_IDX        4
 153 #define SSL_ENC_NULL_IDX        5
 154 #define SSL_ENC_AES128_IDX      6
 155 #define SSL_ENC_AES256_IDX      7
 156 #define SSL_ENC_CAMELLIA128_IDX 8
 157 #define SSL_ENC_CAMELLIA256_IDX 9
 158 #define SSL_ENC_NUM_IDX         10
 159
 160
 161 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
 162         NULL,NULL,NULL,NULL,NULL,NULL,
 163         };
 164
 165 #define SSL_COMP_NULL_IDX       0
 166 #define SSL_COMP_ZLIB_IDX       1
 167 #define SSL_COMP_NUM_IDX        2
 168
 169 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
 170
 171 #define SSL_MD_MD5_IDX  0
 172 #define SSL_MD_SHA1_IDX 1
 173 #define SSL_MD_NUM_IDX  2
 174 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
 175         NULL,NULL,
 176         };
 177
 178 #define CIPHER_ADD      1
 179 #define CIPHER_KILL     2
 180 #define CIPHER_DEL      3
 181 #define CIPHER_ORD      4
 182 #define CIPHER_SPECIAL  5
 183
 184 typedef struct cipher_order_st
 185         {
 186         SSL_CIPHER *cipher;
 187         int active;
 188         int dead;
 189         struct cipher_order_st *next,*prev;
 190         } CIPHER_ORDER;
 191
 192 static const SSL_CIPHER cipher_aliases[]={
 193         /* "ALL" doesn't include eNULL (must be specifically enabled) */
 194         {0,SSL_TXT_ALL,0,     0,0,~SSL_eNULL,0,0,0,0,0,0},
 195         /* "COMPLEMENTOFALL" */
 196         {0,SSL_TXT_CMPALL,0,  0,0,SSL_eNULL,0,0,0,0,0,0},
 197
 198         /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
 199         {0,SSL_TXT_CMPDEF,0,  SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
 200
 201         /* key exchange aliases
 202          * (some of those using only a single bit here combine
 203          * multiple key exchange algs according to the RFCs,
 204          * e.g. kEDH combines DHE_DSS and DHE_RSA) */
 205         {0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},
 206
 207         {0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 208         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 209         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 210         {0,SSL_TXT_kEDH,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
 211         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
 212
 213         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
 214
 215         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
 216         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
 217         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
 218         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
 219         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
 220
 221         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
 222
 223
 224         /* server authentication aliases */
 225         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
 226         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
 227         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
 228         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
 229         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
 230         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 231         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
 232         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
 233         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
 234         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
 235
 236
 237         /* aliases combining key exchange and server authentication */
 238         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
 239         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
 240         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
 241         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
 242         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
 243         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
 244         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
 245         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
 246
 247
 248         /* symmetric encryption aliases */
 249         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
 250         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
 251         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
 252         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
 253         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
 254         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
 255         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128,0,0,0,0,0,0},
 256         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256,0,0,0,0,0,0},
 257         {0,SSL_TXT_AES,0,     0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0},
 258         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
 259         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
 260         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
 261
 262         /* MAC aliases */
 263         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
 264         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
 265         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
 266
 267         /* protocol version aliases */
 268         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
 269         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
 270         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
 271
 272         /* export flag */
 273         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
 274         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
 275
 276         /* strength classes */
 277         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
 278         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
 279         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
 280         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
 281         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
 282         };
 283
 284 void ssl_load_ciphers(void)
 285         {
 286         ssl_cipher_methods[SSL_ENC_DES_IDX]=
 287                 EVP_get_cipherbyname(SN_des_cbc);
 288         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
 289                 EVP_get_cipherbyname(SN_des_ede3_cbc);
 290         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
 291                 EVP_get_cipherbyname(SN_rc4);
 292         ssl_cipher_methods[SSL_ENC_RC2_IDX]=
 293                 EVP_get_cipherbyname(SN_rc2_cbc);
 294 #ifndef OPENSSL_NO_IDEA
 295         ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
 296                 EVP_get_cipherbyname(SN_idea_cbc);
 297 #else
 298         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
 299 #endif
 300         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
 301           EVP_get_cipherbyname(SN_aes_128_cbc);
 302         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
 303           EVP_get_cipherbyname(SN_aes_256_cbc);
 304         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
 305           EVP_get_cipherbyname(SN_camellia_128_cbc);
 306         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
 307           EVP_get_cipherbyname(SN_camellia_256_cbc);
 308
 309         ssl_digest_methods[SSL_MD_MD5_IDX]=
 310                 EVP_get_digestbyname(SN_md5);
 311         ssl_digest_methods[SSL_MD_SHA1_IDX]=
 312                 EVP_get_digestbyname(SN_sha1);
 313         }
 314
 315
 316 #ifndef OPENSSL_NO_COMP
 317
 318 static int sk_comp_cmp(const SSL_COMP * const *a,
 319                         const SSL_COMP * const *b)
 320         {
 321         return((*a)->id-(*b)->id);
 322         }
 323
 324 static void load_builtin_compressions(void)
 325         {
 326         int got_write_lock = 0;
 327
 328         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
 329         if (ssl_comp_methods == NULL)
 330                 {
 331                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 332                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 333                 got_write_lock = 1;
 334
 335                 if (ssl_comp_methods == NULL)
 336                         {
 337                         SSL_COMP *comp = NULL;
 338
 339                         MemCheck_off();
 340                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
 341                         if (ssl_comp_methods != NULL)
 342                                 {
 343                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
 344                                 if (comp != NULL)
 345                                         {
 346                                         comp->method=COMP_zlib();
 347                                         if (comp->method
 348                                                 && comp->method->type == NID_undef)
 349                                                 OPENSSL_free(comp);
 350                                         else
 351                                                 {
 352                                                 comp->id=SSL_COMP_ZLIB_IDX;
 353                                                 comp->name=comp->method->name;
 354                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
 355                                                 }
 356                                         }
 357                                 }
 358                         MemCheck_on();
 359                         }
 360                 }
 361
 362         if (got_write_lock)
 363                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 364         else
 365                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 366         }
 367 #endif
 368
 369 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
 370              const EVP_MD **md, SSL_COMP **comp)
 371         {
 372         int i;
 373         SSL_CIPHER *c;
 374
 375         c=s->cipher;
 376         if (c == NULL) return(0);
 377         if (comp != NULL)
 378                 {
 379                 SSL_COMP ctmp;
 380 #ifndef OPENSSL_NO_COMP
 381                 load_builtin_compressions();
 382 #endif
 383
 384                 *comp=NULL;
 385                 ctmp.id=s->compress_meth;
 386                 if (ssl_comp_methods != NULL)
 387                         {
 388                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
 389                         if (i >= 0)
 390                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
 391                         else
 392                                 *comp=NULL;
 393                         }
 394                 }
 395
 396         if ((enc == NULL) || (md == NULL)) return(0);
 397
 398         switch (c->algorithm_enc)
 399                 {
 400         case SSL_DES:
 401                 i=SSL_ENC_DES_IDX;
 402                 break;
 403         case SSL_3DES:
 404                 i=SSL_ENC_3DES_IDX;
 405                 break;
 406         case SSL_RC4:
 407                 i=SSL_ENC_RC4_IDX;
 408                 break;
 409         case SSL_RC2:
 410                 i=SSL_ENC_RC2_IDX;
 411                 break;
 412         case SSL_IDEA:
 413                 i=SSL_ENC_IDEA_IDX;
 414                 break;
 415         case SSL_eNULL:
 416                 i=SSL_ENC_NULL_IDX;
 417                 break;
 418         case SSL_AES128:
 419                 i=SSL_ENC_AES128_IDX;
 420                 break;
 421         case SSL_AES256:
 422                 i=SSL_ENC_AES256_IDX;
 423                 break;
 424         case SSL_CAMELLIA128:
 425                 i=SSL_ENC_CAMELLIA128_IDX;
 426                 break;
 427         case SSL_CAMELLIA256:
 428                 i=SSL_ENC_CAMELLIA256_IDX;
 429                 break;
 430         default:
 431                 i= -1;
 432                 break;
 433                 }
 434
 435         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
 436                 *enc=NULL;
 437         else
 438                 {
 439                 if (i == SSL_ENC_NULL_IDX)
 440                         *enc=EVP_enc_null();
 441                 else
 442                         *enc=ssl_cipher_methods[i];
 443                 }
 444
 445         switch (c->algorithm_mac)
 446                 {
 447         case SSL_MD5:
 448                 i=SSL_MD_MD5_IDX;
 449                 break;
 450         case SSL_SHA1:
 451                 i=SSL_MD_SHA1_IDX;
 452                 break;
 453         default:
 454                 i= -1;
 455                 break;
 456                 }
 457         if ((i < 0) || (i > SSL_MD_NUM_IDX))
 458                 *md=NULL;
 459         else
 460                 *md=ssl_digest_methods[i];
 461
 462         if ((*enc != NULL) && (*md != NULL))
 463                 return(1);
 464         else
 465                 return(0);
 466         }
 467
 468 #define ITEM_SEP(a) \
 469         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
 470
 471 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 472              CIPHER_ORDER **tail)
 473         {
 474         if (curr == *tail) return;
 475         if (curr == *head)
 476                 *head=curr->next;
 477         if (curr->prev != NULL)
 478                 curr->prev->next=curr->next;
 479         if (curr->next != NULL) /* should always be true */
 480                 curr->next->prev=curr->prev;
 481         (*tail)->next=curr;
 482         curr->prev= *tail;
 483         curr->next=NULL;
 484         *tail=curr;
 485         }
 486
 487 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
 488         {
 489         *mkey = 0;
 490         *auth = 0;
 491         *enc = 0;
 492         *mac = 0;
 493         *ssl = 0;
 494
 495 #ifdef OPENSSL_NO_RSA
 496         *mkey |= SSL_kRSA;
 497         *auth |= SSL_aRSA;
 498 #endif
 499 #ifdef OPENSSL_NO_DSA
 500         *auth |= SSL_aDSS;
 501 #endif
 502         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
 503         *auth |= SSL_aDH;
 504 #ifdef OPENSSL_NO_DH
 505         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
 506         *auth |= SSL_aDH;
 507 #endif
 508 #ifdef OPENSSL_NO_KRB5
 509         *mkey |= SSL_kKRB5;
 510         *auth |= SSL_aKRB5;
 511 #endif
 512 #ifdef OPENSSL_NO_ECDSA
 513         *auth |= SSL_aECDSA;
 514 #endif
 515 #ifdef OPENSSL_NO_ECDH
 516         *mkey |= SSL_kECDHe|SSL_kECDHr;
 517         *auth |= SSL_aECDH;
 518 #endif
 519 #ifdef OPENSSL_NO_PSK
 520         *mkey |= SSL_kPSK;
 521         *auth |= SSL_aPSK;
 522 #endif
 523 #ifdef SSL_FORBID_ENULL
 524         *enc |= SSL_eNULL;
 525 #endif
 526
 527         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
 528         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
 529         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
 530         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
 531         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
 532         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
 533         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
 534         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
 535         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
 536
 537         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
 538         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
 539         }
 540
 541 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
 542                 int num_of_ciphers,
 543                 unsigned long disabled_mkey, unsigned long disabled_auth,
 544                 unsigned long disabled_enc, unsigned long disabled_mac,
 545                 unsigned long disabled_ssl,
 546                 CIPHER_ORDER *co_list,
 547                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 548         {
 549         int i, co_list_num;
 550         SSL_CIPHER *c;
 551
 552         /*
 553          * We have num_of_ciphers descriptions compiled in, depending on the
 554          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
 555          * These will later be sorted in a linked list with at most num
 556          * entries.
 557          */
 558
 559         /* Get the initial list of ciphers */
 560         co_list_num = 0;        /* actual count of ciphers */
 561         for (i = 0; i < num_of_ciphers; i++)
 562                 {
 563                 c = ssl_method->get_cipher(i);
 564                 /* drop those that use any of that is not available */
 565                 if ((c != NULL) && c->valid &&
 566                     !(c->algorithm_mkey & disabled_mkey) &&
 567                     !(c->algorithm_auth & disabled_auth) &&
 568                     !(c->algorithm_enc & disabled_enc) &&
 569                     !(c->algorithm_mac & disabled_mac) &&
 570                     !(c->algorithm_ssl & disabled_ssl))
 571                         {
 572                         co_list[co_list_num].cipher = c;
 573                         co_list[co_list_num].next = NULL;
 574                         co_list[co_list_num].prev = NULL;
 575                         co_list[co_list_num].active = 0;
 576                         co_list_num++;
 577 #ifdef KSSL_DEBUG
 578                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
 579 #endif  /* KSSL_DEBUG */
 580                         /*
 581                         if (!sk_push(ca_list,(char *)c)) goto err;
 582                         */
 583                         }
 584                 }
 585
 586         /*
 587          * Prepare linked list from list entries
 588          */
 589         for (i = 1; i < co_list_num - 1; i++)
 590                 {
 591                 co_list[i].prev = &(co_list[i-1]);
 592                 co_list[i].next = &(co_list[i+1]);
 593                 }
 594         if (co_list_num > 0)
 595                 {
 596                 (*head_p) = &(co_list[0]);
 597                 (*head_p)->prev = NULL;
 598                 (*head_p)->next = &(co_list[1]);
 599                 (*tail_p) = &(co_list[co_list_num - 1]);
 600                 (*tail_p)->prev = &(co_list[co_list_num - 2]);
 601                 (*tail_p)->next = NULL;
 602                 }
 603         }
 604
 605 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
 606                         int num_of_group_aliases,
 607                         unsigned long disabled_mkey, unsigned long disabled_auth,
 608                         unsigned long disabled_enc, unsigned long disabled_mac,
 609                         unsigned long disabled_ssl,
 610                         CIPHER_ORDER *head)
 611         {
 612         CIPHER_ORDER *ciph_curr;
 613         SSL_CIPHER **ca_curr;
 614         int i;
 615         unsigned long mask_mkey = ~disabled_mkey;
 616         unsigned long mask_auth = ~disabled_auth;
 617         unsigned long mask_enc = ~disabled_enc;
 618         unsigned long mask_mac = ~disabled_mac;
 619         unsigned long mask_ssl = ~disabled_ssl;
 620
 621         /*
 622          * First, add the real ciphers as already collected
 623          */
 624         ciph_curr = head;
 625         ca_curr = ca_list;
 626         while (ciph_curr != NULL)
 627                 {
 628                 *ca_curr = ciph_curr->cipher;
 629                 ca_curr++;
 630                 ciph_curr = ciph_curr->next;
 631                 }
 632
 633         /*
 634          * Now we add the available ones from the cipher_aliases[] table.
 635          * They represent either one or more algorithms, some of which
 636          * in any affected category must be supported (set in enabled_mask),
 637          * or represent a cipher strength value (will be added in any case because algorithms=0).
 638          */
 639         for (i = 0; i < num_of_group_aliases; i++)
 640                 {
 641                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
 642                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
 643                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
 644                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
 645                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
 646
 647                 if (algorithm_mkey)
 648                         if ((algorithm_mkey & mask_mkey) == 0)
 649                                 continue;
 650
 651                 if (algorithm_auth)
 652                         if ((algorithm_auth & mask_auth) == 0)
 653                                 continue;
 654
 655                 if (algorithm_enc)
 656                         if ((algorithm_enc & mask_enc) == 0)
 657                                 continue;
 658
 659                 if (algorithm_mac)
 660                         if ((algorithm_mac & mask_mac) == 0)
 661                                 continue;
 662
 663                 if (algorithm_ssl)
 664                         if ((algorithm_ssl & mask_ssl) == 0)
 665                                 continue;
 666
 667                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
 668                 ca_curr++;
 669                 }
 670
 671         *ca_curr = NULL;        /* end of list */
 672         }
 673
 674 static void ssl_cipher_apply_rule(unsigned long cipher_id,
 675                 unsigned long alg_mkey, unsigned long alg_auth,
 676                 unsigned long alg_enc, unsigned long alg_mac,
 677                 unsigned long alg_ssl,
 678                 unsigned long algo_strength,
 679                 int rule, int strength_bits,
 680                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 681         {
 682         CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
 683         SSL_CIPHER *cp;
 684
 685 #ifdef CIPHER_DEBUG
 686         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
 687                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
 688 #endif
 689
 690         curr = head = *head_p;
 691         curr2 = head;
 692         tail2 = tail = *tail_p;
 693         for (;;)
 694                 {
 695                 if ((curr == NULL) || (curr == tail2)) break;
 696                 curr = curr2;
 697                 curr2 = curr->next;
 698
 699                 cp = curr->cipher;
 700
 701                 /*
 702                  * Selection criteria is either the value of strength_bits
 703                  * or the algorithms used.
 704                  */
 705                 if (strength_bits >= 0)
 706                         {
 707                         if (strength_bits != cp->strength_bits)
 708                                 continue;
 709                         }
 710                 else
 711                         {
 712 #ifdef CIPHER_DEBUG
 713                         printf("\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n", cp->name, cp->algorithm_mkey, cp->algorithm_auth, cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl, cp->algo_strength);
 714 #endif
 715
 716                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
 717                                 continue;
 718                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
 719                                 continue;
 720                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
 721                                 continue;
 722                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
 723                                 continue;
 724                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
 725                                 continue;
 726                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
 727                                 continue;
 728                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
 729                                 continue;
 730                         }
 731
 732 #ifdef CIPHER_DEBUG
 733                 printf("Action = %d\n", rule);
 734 #endif
 735
 736                 /* add the cipher if it has not been added yet. */
 737                 if (rule == CIPHER_ADD)
 738                         {
 739                         if (!curr->active)
 740                                 {
 741                                 ll_append_tail(&head, curr, &tail);
 742                                 curr->active = 1;
 743                                 }
 744                         }
 745                 /* Move the added cipher to this location */
 746                 else if (rule == CIPHER_ORD)
 747                         {
 748                         if (curr->active)
 749                                 {
 750                                 ll_append_tail(&head, curr, &tail);
 751                                 }
 752                         }
 753                 else if (rule == CIPHER_DEL)
 754                         curr->active = 0;
 755                 else if (rule == CIPHER_KILL)
 756                         {
 757                         if (head == curr)
 758                                 head = curr->next;
 759                         else
 760                                 curr->prev->next = curr->next;
 761                         if (tail == curr)
 762                                 tail = curr->prev;
 763                         curr->active = 0;
 764                         if (curr->next != NULL)
 765                                 curr->next->prev = curr->prev;
 766                         if (curr->prev != NULL)
 767                                 curr->prev->next = curr->next;
 768                         curr->next = NULL;
 769                         curr->prev = NULL;
 770                         }
 771                 }
 772
 773         *head_p = head;
 774         *tail_p = tail;
 775         }
 776
 777 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
 778                                     CIPHER_ORDER **tail_p)
 779         {
 780         int max_strength_bits, i, *number_uses;
 781         CIPHER_ORDER *curr;
 782
 783         /*
 784          * This routine sorts the ciphers with descending strength. The sorting
 785          * must keep the pre-sorted sequence, so we apply the normal sorting
 786          * routine as '+' movement to the end of the list.
 787          */
 788         max_strength_bits = 0;
 789         curr = *head_p;
 790         while (curr != NULL)
 791                 {
 792                 if (curr->active &&
 793                     (curr->cipher->strength_bits > max_strength_bits))
 794                     max_strength_bits = curr->cipher->strength_bits;
 795                 curr = curr->next;
 796                 }
 797
 798         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
 799         if (!number_uses)
 800                 {
 801                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
 802                 return(0);
 803                 }
 804         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
 805
 806         /*
 807          * Now find the strength_bits values actually used
 808          */
 809         curr = *head_p;
 810         while (curr != NULL)
 811                 {
 812                 if (curr->active)
 813                         number_uses[curr->cipher->strength_bits]++;
 814                 curr = curr->next;
 815                 }
 816         /*
 817          * Go through the list of used strength_bits values in descending
 818          * order.
 819          */
 820         for (i = max_strength_bits; i >= 0; i--)
 821                 if (number_uses[i] > 0)
 822                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
 823
 824         OPENSSL_free(number_uses);
 825         return(1);
 826         }
 827
 828 static int ssl_cipher_process_rulestr(const char *rule_str,
 829                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
 830                 SSL_CIPHER **ca_list)
 831         {
 832         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
 833         const char *l, *start, *buf;
 834         int j, multi, found, rule, retval, ok, buflen;
 835         unsigned long cipher_id = 0;
 836         char ch;
 837
 838         retval = 1;
 839         l = rule_str;
 840         for (;;)
 841                 {
 842                 ch = *l;
 843
 844                 if (ch == '\0')
 845                         break;          /* done */
 846                 if (ch == '-')
 847                         { rule = CIPHER_DEL; l++; }
 848                 else if (ch == '+')
 849                         { rule = CIPHER_ORD; l++; }
 850                 else if (ch == '!')
 851                         { rule = CIPHER_KILL; l++; }
 852                 else if (ch == '@')
 853                         { rule = CIPHER_SPECIAL; l++; }
 854                 else
 855                         { rule = CIPHER_ADD; }
 856
 857                 if (ITEM_SEP(ch))
 858                         {
 859                         l++;
 860                         continue;
 861                         }
 862
 863                 alg_mkey = 0;
 864                 alg_auth = 0;
 865                 alg_enc = 0;
 866                 alg_mac = 0;
 867                 alg_ssl = 0;
 868                 algo_strength = 0;
 869
 870                 start=l;
 871                 for (;;)
 872                         {
 873                         ch = *l;
 874                         buf = l;
 875                         buflen = 0;
 876 #ifndef CHARSET_EBCDIC
 877                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
 878                                 ((ch >= '0') && (ch <= '9')) ||
 879                                 ((ch >= 'a') && (ch <= 'z')) ||
 880                                  (ch == '-'))
 881 #else
 882                         while ( isalnum(ch) || (ch == '-'))
 883 #endif
 884                                  {
 885                                  ch = *(++l);
 886                                  buflen++;
 887                                  }
 888
 889                         if (buflen == 0)
 890                                 {
 891                                 /*
 892                                  * We hit something we cannot deal with,
 893                                  * it is no command or separator nor
 894                                  * alphanumeric, so we call this an error.
 895                                  */
 896                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
 897                                        SSL_R_INVALID_COMMAND);
 898                                 retval = found = 0;
 899                                 l++;
 900                                 break;
 901                                 }
 902
 903                         if (rule == CIPHER_SPECIAL)
 904                                 {
 905                                 found = 0; /* unused -- avoid compiler warning */
 906                                 break;  /* special treatment */
 907                                 }
 908
 909                         /* check for multi-part specification */
 910                         if (ch == '+')
 911                                 {
 912                                 multi=1;
 913                                 l++;
 914                                 }
 915                         else
 916                                 multi=0;
 917
 918                         /*
 919                          * Now search for the cipher alias in the ca_list. Be careful
 920                          * with the strncmp, because the "buflen" limitation
 921                          * will make the rule "ADH:SOME" and the cipher
 922                          * "ADH-MY-CIPHER" look like a match for buflen=3.
 923                          * So additionally check whether the cipher name found
 924                          * has the correct length. We can save a strlen() call:
 925                          * just checking for the '\0' at the right place is
 926                          * sufficient, we have to strncmp() anyway. (We cannot
 927                          * use strcmp(), because buf is not '\0' terminated.)
 928                          */
 929                         j = found = 0;
 930                         cipher_id = 0;
 931                         while (ca_list[j])
 932                                 {
 933                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
 934                                     (ca_list[j]->name[buflen] == '\0'))
 935                                         {
 936                                         found = 1;
 937                                         break;
 938                                         }
 939                                 else
 940                                         j++;
 941                                 }
 942
 943                         if (!found)
 944                                 break;  /* ignore this entry */
 945
 946                         if (ca_list[j]->algorithm_mkey)
 947                                 {
 948                                 if (alg_mkey)
 949                                         {
 950                                         alg_mkey &= ca_list[j]->algorithm_mkey;
 951                                         if (!alg_mkey) { found = 0; break; }
 952                                         }
 953                                 else
 954                                         alg_mkey = ca_list[j]->algorithm_mkey;
 955                                 }
 956
 957                         if (ca_list[j]->algorithm_auth)
 958                                 {
 959                                 if (alg_auth)
 960                                         {
 961                                         alg_auth &= ca_list[j]->algorithm_auth;
 962                                         if (!alg_auth) { found = 0; break; }
 963                                         }
 964                                 else
 965                                         alg_auth = ca_list[j]->algorithm_auth;
 966                                 }
 967
 968                         if (ca_list[j]->algorithm_enc)
 969                                 {
 970                                 if (alg_enc)
 971                                         {
 972                                         alg_enc &= ca_list[j]->algorithm_enc;
 973                                         if (!alg_enc) { found = 0; break; }
 974                                         }
 975                                 else
 976                                         alg_enc = ca_list[j]->algorithm_enc;
 977                                 }
 978
 979                         if (ca_list[j]->algorithm_mac)
 980                                 {
 981                                 if (alg_mac)
 982                                         {
 983                                         alg_mac &= ca_list[j]->algorithm_mac;
 984                                         if (!alg_mac) { found = 0; break; }
 985                                         }
 986                                 else
 987                                         alg_mac = ca_list[j]->algorithm_mac;
 988                                 }
 989
 990                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
 991                                 {
 992                                 if (algo_strength & SSL_EXP_MASK)
 993                                         {
 994                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
 995                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
 996                                         }
 997                                 else
 998                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
 999                                 }
1000
1001                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1002                                 {
1003                                 if (algo_strength & SSL_STRONG_MASK)
1004                                         {
1005                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1006                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1007                                         }
1008                                 else
1009                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1010                                 }
1011
1012                         if (ca_list[j]->valid)
1013                                 {
1014                                 /* explicit ciphersuite found; its protocol version
1015                                  * does not become part of the search pattern!*/
1016
1017                                 cipher_id = ca_list[j]->id;
1018                                 }
1019                         else
1020                                 {
1021                                 /* not an explicit ciphersuite; only in this case, the
1022                                  * protocol version is considered part of the search pattern */
1023
1024                                 if (ca_list[j]->algorithm_ssl)
1025                                         {
1026                                         if (alg_ssl)
1027                                                 {
1028                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1029                                                 if (!alg_ssl) { found = 0; break; }
1030                                                 }
1031                                         else
1032                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1033                                         }
1034                                 }
1035
1036                         if (!multi) break;
1037                         }
1038
1039                 /*
1040                  * Ok, we have the rule, now apply it
1041                  */
1042                 if (rule == CIPHER_SPECIAL)
1043                         {       /* special command */
1044                         ok = 0;
1045                         if ((buflen == 8) &&
1046                                 !strncmp(buf, "STRENGTH", 8))
1047                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1048                         else
1049                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1050                                         SSL_R_INVALID_COMMAND);
1051                         if (ok == 0)
1052                                 retval = 0;
1053                         /*
1054                          * We do not support any "multi" options
1055                          * together with "@", so throw away the
1056                          * rest of the command, if any left, until
1057                          * end or ':' is found.
1058                          */
1059                         while ((*l != '\0') && !ITEM_SEP(*l))
1060                                 l++;
1061                         }
1062                 else if (found)
1063                         {
1064                         ssl_cipher_apply_rule(cipher_id,
1065                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1066                                 rule, -1, head_p, tail_p);
1067                         }
1068                 else
1069                         {
1070                         while ((*l != '\0') && !ITEM_SEP(*l))
1071                                 l++;
1072                         }
1073                 if (*l == '\0') break; /* done */
1074                 }
1075
1076         return(retval);
1077         }
1078
1079 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1080                 STACK_OF(SSL_CIPHER) **cipher_list,
1081                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1082                 const char *rule_str)
1083         {
1084         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1085         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1086         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1087         const char *rule_p;
1088         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1089         SSL_CIPHER **ca_list = NULL;
1090
1091         /*
1092          * Return with error if nothing to do.
1093          */
1094         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1095                 return NULL;
1096
1097         /*
1098          * To reduce the work to do we only want to process the compiled
1099          * in algorithms, so we first get the mask of disabled ciphers.
1100          */
1101         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1102
1103         /*
1104          * Now we have to collect the available ciphers from the compiled
1105          * in ciphers. We cannot get more than the number compiled in, so
1106          * it is used for allocation.
1107          */
1108         num_of_ciphers = ssl_method->num_ciphers();
1109 #ifdef KSSL_DEBUG
1110         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1111 #endif    /* KSSL_DEBUG */
1112         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1113         if (co_list == NULL)
1114                 {
1115                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1116                 return(NULL);   /* Failure */
1117                 }
1118
1119         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1120                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1121                                    co_list, &head, &tail);
1122
1123
1124         /* Now arrange all ciphers by preference: */
1125
1126         /* Temporarily enabled AES first (preferred cipher) */
1127         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1128
1129         /* Temporarily enable everything else */
1130         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1131
1132         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1133          * (For applications that allow them, they aren't too bad, but we prefer
1134          * authenticated ciphers.) */
1135         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1136
1137         /* Move ciphers without forward secrecy to then end */
1138         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1139         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1140         ssl_cipher_apply_rule(0, 0, SSL_kPSK, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1141
1142         /* RC4 is sort-of broken -- move the the end */
1143         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1144
1145         /* Now sort by symmetric encryption strength.  The above ordering remains
1146          * in force within each class */
1147         if (!ssl_cipher_strength_sort(&head, &tail))
1148                 {
1149                 OPENSSL_free(co_list);
1150                 return NULL;
1151                 }
1152
1153         /* Now disable everything (maintaining the ordering!) */
1154         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1155
1156
1157         /*
1158          * We also need cipher aliases for selecting based on the rule_str.
1159          * There might be two types of entries in the rule_str: 1) names
1160          * of ciphers themselves 2) aliases for groups of ciphers.
1161          * For 1) we need the available ciphers and for 2) the cipher
1162          * groups of cipher_aliases added together in one list (otherwise
1163          * we would be happy with just the cipher_aliases table).
1164          */
1165         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1166         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1167         ca_list =
1168                 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1169         if (ca_list == NULL)
1170                 {
1171                 OPENSSL_free(co_list);
1172                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1173                 return(NULL);   /* Failure */
1174                 }
1175         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1176                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1177                                    head);
1178
1179         /*
1180          * If the rule_string begins with DEFAULT, apply the default rule
1181          * before using the (possibly available) additional rules.
1182          */
1183         ok = 1;
1184         rule_p = rule_str;
1185         if (strncmp(rule_str,"DEFAULT",7) == 0)
1186                 {
1187                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1188                         &head, &tail, ca_list);
1189                 rule_p += 7;
1190                 if (*rule_p == ':')
1191                         rule_p++;
1192                 }
1193
1194         if (ok && (strlen(rule_p) > 0))
1195                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1196
1197         OPENSSL_free(ca_list);  /* Not needed anymore */
1198
1199         if (!ok)
1200                 {       /* Rule processing failure */
1201                 OPENSSL_free(co_list);
1202                 return(NULL);
1203                 }
1204
1205         /*
1206          * Allocate new "cipherstack" for the result, return with error
1207          * if we cannot get one.
1208          */
1209         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1210                 {
1211                 OPENSSL_free(co_list);
1212                 return(NULL);
1213                 }
1214
1215         /*
1216          * The cipher selection for the list is done. The ciphers are added
1217          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1218          */
1219         for (curr = head; curr != NULL; curr = curr->next)
1220                 {
1221                 if (curr->active)
1222                         {
1223                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1224 #ifdef CIPHER_DEBUG
1225                         printf("<%s>\n",curr->cipher->name);
1226 #endif
1227                         }
1228                 }
1229         OPENSSL_free(co_list);  /* Not needed any longer */
1230
1231         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1232         if (tmp_cipher_list == NULL)
1233                 {
1234                 sk_SSL_CIPHER_free(cipherstack);
1235                 return NULL;
1236                 }
1237         if (*cipher_list != NULL)
1238                 sk_SSL_CIPHER_free(*cipher_list);
1239         *cipher_list = cipherstack;
1240         if (*cipher_list_by_id != NULL)
1241                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1242         *cipher_list_by_id = tmp_cipher_list;
1243         sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1244
1245         return(cipherstack);
1246         }
1247
1248 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
1249         {
1250         int is_export,pkl,kl;
1251         const char *ver,*exp_str;
1252         const char *kx,*au,*enc,*mac;
1253         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2,alg_s;
1254 #ifdef KSSL_DEBUG
1255         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1256 #else
1257         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1258 #endif /* KSSL_DEBUG */
1259
1260         alg_mkey = cipher->algorithm_mkey;
1261         alg_auth = cipher->algorithm_auth;
1262         alg_enc = cipher->algorithm_enc;
1263         alg_mac = cipher->algorithm_mac;
1264         alg_ssl = cipher->algorithm_ssl;
1265
1266         alg_s=cipher->algo_strength;
1267         alg2=cipher->algorithm2;
1268
1269         is_export=SSL_C_IS_EXPORT(cipher);
1270         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1271         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1272         exp_str=is_export?" export":"";
1273
1274         if (alg_ssl & SSL_SSLV2)
1275                 ver="SSLv2";
1276         else if (alg_ssl & SSL_SSLV3)
1277                 ver="SSLv3";
1278         else
1279                 ver="unknown";
1280
1281         switch (alg_mkey)
1282                 {
1283         case SSL_kRSA:
1284                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1285                 break;
1286         case SSL_kDHr:
1287                 kx="DH/RSA";
1288                 break;
1289         case SSL_kDHd:
1290                 kx="DH/DSS";
1291                 break;
1292         case SSL_kKRB5:
1293                 kx="KRB5";
1294                 break;
1295         case SSL_kEDH:
1296                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1297                 break;
1298         case SSL_kECDHr:
1299                 kx="ECDH/RSA";
1300                 break;
1301         case SSL_kECDHe:
1302                 kx="ECDH/ECDSA";
1303                 break;
1304         case SSL_kEECDH:
1305                 kx="ECDH";
1306                 break;
1307         case SSL_kPSK:
1308                 kx="PSK";
1309                 break;
1310         default:
1311                 kx="unknown";
1312                 }
1313
1314         switch (alg_auth)
1315                 {
1316         case SSL_aRSA:
1317                 au="RSA";
1318                 break;
1319         case SSL_aDSS:
1320                 au="DSS";
1321                 break;
1322         case SSL_aDH:
1323                 au="DH";
1324                 break;
1325         case SSL_aKRB5:
1326                 au="KRB5";
1327                 break;
1328         case SSL_aECDH:
1329                 au="ECDH";
1330                 break;
1331         case SSL_aNULL:
1332                 au="None";
1333                 break;
1334         case SSL_aECDSA:
1335                 au="ECDSA";
1336                 break;
1337         case SSL_aPSK:
1338                 au="PSK";
1339                 break;
1340         default:
1341                 au="unknown";
1342                 break;
1343                 }
1344
1345         switch (alg_enc)
1346                 {
1347         case SSL_DES:
1348                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1349                 break;
1350         case SSL_3DES:
1351                 enc="3DES(168)";
1352                 break;
1353         case SSL_RC4:
1354                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1355                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1356                 break;
1357         case SSL_RC2:
1358                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1359                 break;
1360         case SSL_IDEA:
1361                 enc="IDEA(128)";
1362                 break;
1363         case SSL_eNULL:
1364                 enc="None";
1365                 break;
1366         case SSL_AES128:
1367                 enc="AES(128)";
1368                 break;
1369         case SSL_AES256:
1370                 enc="AES(256)";
1371                 break;
1372         case SSL_CAMELLIA128:
1373                 enc="Camellia(128)";
1374                 break;
1375         case SSL_CAMELLIA256:
1376                 enc="Camellia(256)";
1377                 break;
1378         default:
1379                 enc="unknown";
1380                 break;
1381                 }
1382
1383         switch (alg_mac)
1384                 {
1385         case SSL_MD5:
1386                 mac="MD5";
1387                 break;
1388         case SSL_SHA1:
1389                 mac="SHA1";
1390                 break;
1391         default:
1392                 mac="unknown";
1393                 break;
1394                 }
1395
1396         if (buf == NULL)
1397                 {
1398                 len=128;
1399                 buf=OPENSSL_malloc(len);
1400                 if (buf == NULL) return("OPENSSL_malloc Error");
1401                 }
1402         else if (len < 128)
1403                 return("Buffer too small");
1404
1405 #ifdef KSSL_DEBUG
1406         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1407 #else
1408         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1409 #endif /* KSSL_DEBUG */
1410         return(buf);
1411         }
1412
1413 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1414         {
1415         int i;
1416
1417         if (c == NULL) return("(NONE)");
1418         i=(int)(c->id>>24L);
1419         if (i == 3)
1420                 return("TLSv1/SSLv3");
1421         else if (i == 2)
1422                 return("SSLv2");
1423         else
1424                 return("unknown");
1425         }
1426
1427 /* return the actual cipher being used */
1428 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1429         {
1430         if (c != NULL)
1431                 return(c->name);
1432         return("(NONE)");
1433         }
1434
1435 /* number of bits for symmetric cipher */
1436 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1437         {
1438         int ret=0;
1439
1440         if (c != NULL)
1441                 {
1442                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1443                 ret = c->strength_bits;
1444                 }
1445         return(ret);
1446         }
1447
1448 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1449         {
1450         SSL_COMP *ctmp;
1451         int i,nn;
1452
1453         if ((n == 0) || (sk == NULL)) return(NULL);
1454         nn=sk_SSL_COMP_num(sk);
1455         for (i=0; i<nn; i++)
1456                 {
1457                 ctmp=sk_SSL_COMP_value(sk,i);
1458                 if (ctmp->id == n)
1459                         return(ctmp);
1460                 }
1461         return(NULL);
1462         }
1463
1464 #ifdef OPENSSL_NO_COMP
1465 void *SSL_COMP_get_compression_methods(void)
1466         {
1467         return NULL;
1468         }
1469 int SSL_COMP_add_compression_method(int id, void *cm)
1470         {
1471         return 1;
1472         }
1473
1474 const char *SSL_COMP_get_name(const void *comp)
1475         {
1476         return NULL;
1477         }
1478 #else
1479 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1480         {
1481         load_builtin_compressions();
1482         return(ssl_comp_methods);
1483         }
1484
1485 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1486         {
1487         SSL_COMP *comp;
1488
1489         if (cm == NULL || cm->type == NID_undef)
1490                 return 1;
1491
1492         /* According to draft-ietf-tls-compression-04.txt, the
1493            compression number ranges should be the following:
1494
1495            0 to 63:    methods defined by the IETF
1496            64 to 192:  external party methods assigned by IANA
1497            193 to 255: reserved for private use */
1498         if (id < 193 || id > 255)
1499                 {
1500                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1501                 return 0;
1502                 }
1503
1504         MemCheck_off();
1505         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1506         comp->id=id;
1507         comp->method=cm;
1508         load_builtin_compressions();
1509         if (ssl_comp_methods
1510                 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1511                 {
1512                 OPENSSL_free(comp);
1513                 MemCheck_on();
1514                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1515                 return(1);
1516                 }
1517         else if ((ssl_comp_methods == NULL)
1518                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1519                 {
1520                 OPENSSL_free(comp);
1521                 MemCheck_on();
1522                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1523                 return(1);
1524                 }
1525         else
1526                 {
1527                 MemCheck_on();
1528                 return(0);
1529                 }
1530         }
1531
1532 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1533         {
1534         if (comp)
1535                 return comp->name;
1536         return NULL;
1537         }
1538
1539 #endif